Information sending method, receive power measurement method, device, and system

Abstract

An information sending method, including obtaining, by a network device, first indication information, where the first indication information indicates a magnitude relationship between a transmit power of a first signal received by a terminal device and a transmit power of a reference signal received by the terminal device, and the first signal is a synchronization signal, and sending the first indication information from the network device to the terminal device.

What is claimed is: 
     
       1. An information sending method, comprising:
 obtaining, by a network device, first indication information, wherein the first indication information indicates a magnitude relationship between a transmit power of a first signal received by a terminal device and a transmit power of a reference signal received by the terminal device, wherein the terminal device is a terminal of a narrowband internet of things (NB-IoT) system, wherein the reference signal is a narrowband reference signal (NRS), wherein the first signal is a secondary synchronization signal, wherein the first signal and the reference signal are signals of one of a serving cell or an adjacent cell, and wherein the magnitude relationship is a ratio of the transmit power of the first signal to the transmit power of the reference signal; and 
 sending the first indication information from the network device to the terminal device; 
 wherein the first indication information further includes a first parameter value and a second parameter value; 
 wherein the first parameter value is one of a first index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in a serving cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the serving cell; and 
 wherein the second parameter value is one of a second index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in an adjacent cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the adjacent cell. 
 
     
     
       2. The method according to  claim 1 , wherein the first signal and the reference signal are signals of the serving cell. 
     
     
       3. The method according to  claim 2 , wherein the sending the first indication information to the terminal device comprises:
 sending the first indication information to the terminal device according to a system message. 
 
     
     
       4. The method according to  claim 1 , wherein the first signal and the reference signal are signals of the adjacent cell. 
     
     
       5. The method according to  claim 4 , wherein the sending the first indication information comprises:
 sending the first indication information to the terminal device according to a system message that is at least one of a system information block (SIB) 4 or a SIB 5. 
 
     
     
       6. A receive power measurement method, comprising:
 receiving, by a terminal device, first indication information sent by a network device, wherein the first indication information indicates a magnitude relationship between a transmit power of a first signal received by the terminal device and a transmit power of a reference signal received by the terminal device, wherein the terminal device is a terminal of a narrowband internet of things (NB-IoT) system, wherein the reference signal is a narrowband reference signal (NRS), wherein the first signal is a secondary synchronization signal, wherein the first signal and the reference signal are signals of one of a serving cell or an adjacent cell, and wherein the magnitude relationship is a ratio of the transmit power of the first signal to the transmit power of the reference signal; and 
 determining a first receive power according to the first indication information; 
 wherein the first indication information further includes a first parameter value and a second parameter value; 
 wherein the first parameter value is one of a first index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in a serving cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the serving cell; and 
 wherein the second parameter value is one of a second index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in an adjacent cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the adjacent cell. 
 
     
     
       7. The method according to  claim 6 , wherein the first signal and the reference signal are signals of the serving cell. 
     
     
       8. The method according to  claim 7 , wherein the receiving the first indication information comprises:
 receiving the first indication information sent by the network device according to a system message. 
 
     
     
       9. The method according to  claim 6 , wherein the first signal and the reference signal are signals of an adjacent cell. 
     
     
       10. The method according to  claim 9 , wherein the receiving the first indication information comprises:
 receiving the first indication information sent by the network device according to a system message that is at least one of a system information block (SIB) 4 or a SIB 5. 
 
     
     
       11. A communication apparatus, comprising:
 a transmitter; 
 a processor; and 
 a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
 obtain first indication information, wherein the first indication information indicates a magnitude relationship between a transmit power of a first signal received at a terminal device and a transmit power of a reference signal received at the terminal device, wherein the terminal device is a terminal of a narrowband internet of things (NB-IoT) system, and wherein the reference signal is a narrowband reference signal (NRS); and 
 cause the transmitter to send the first indication information to the terminal device, wherein the first signal is a secondary synchronization signal, wherein the first signal and the reference signal are signals of one of a serving cell or an adjacent cell, and wherein the magnitude relationship is a ratio of the transmit power of the first signal to the transmit power of the reference signal; 
 
 wherein the first indication information further includes a first parameter value and a second parameter value; 
 wherein the first parameter value is one of a first index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in a serving cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the serving cell; and 
 wherein the second parameter value is one of a second index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in an adjacent cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the adjacent cell. 
 
     
     
       12. The communication apparatus according to  claim 11 , wherein the first signal and the reference signal are signals of the serving cell. 
     
     
       13. The communication apparatus according to  claim 12 , wherein the instructions to cause the transmitter to send the first indication information to the terminal device include instructions to:
 cause the transmitter to send the first indication information to the terminal device according to a system message. 
 
     
     
       14. The communication apparatus according to  claim 11 , wherein the first signal and the reference signal are signals of an adjacent cell. 
     
     
       15. The communication apparatus according to  claim 14 , the instructions to cause the transmitter to send the first indication information to the terminal device include instructions to:
 cause the transmitter to send the first indication information to the terminal device according to a system message that is at least one of a system information block (SIB) 4 or a SIB 5. 
 
     
     
       16. A communication apparatus, comprising:
 a receiver; 
 a processor; and 
 a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
 receive, though the receiver, first indication information sent by a network device, wherein the first indication information indicates a magnitude relationship between a transmit power of a first signal received at the communication apparatus and a transmit power of a reference signal received at the communication apparatus, wherein the communications apparatus is a terminal of a narrowband internet of things (NB-IoT) system, and wherein the reference signal is a narrowband reference signal (NRS), wherein the first signal is a secondary synchronization signal, wherein the first signal and the reference signal are signals of one of a serving cell or an adjacent cell, and wherein the magnitude relationship is a ratio of the transmit power of the first signal to the transmit power of the reference signal; and 
 determine a first receive power based on the first indication information; 
 
 wherein the first indication information further includes a first parameter value and a second parameter value; 
 wherein the first parameter value is one of a first index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in a serving cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the serving cell; and 
 wherein the second parameter is value one of a second index number, a ratio of a transmit power of a first signal to a transmit power of a reference signal in an adjacent cell, or a difference between the transmit power of the first signal and the transmit power of the reference signal in the adjacent cell. 
 
     
     
       17. The communication apparatus according to  claim 16 , wherein the first signal and the reference signal are signals of the serving cell. 
     
     
       18. The communication apparatus according to  claim 17 , wherein the instructions to receive the first indication information include instructions to:
 receive the first indication information sent by the network device according to a system message. 
 
     
     
       19. The communication apparatus according to  claim 16 , wherein the first signal and the reference signal are signals of an adjacent cell. 
     
     
       20. The communication apparatus according to  claim 19 , wherein the instructions to receive the first indication information include instructions to:
 receive the first indication information sent by the network device according to a system message that is at least one of a system information block (SIB) 4 or a SIB 5.